THE GEOTECHNICAL USE OF FILTER FABRICS IN HIGHWAY CONSTRUCTION

The principal objective of this study is to assist Regional and Head Office Staff in designing and installing filter fabrics for purposes of drainage, erosion control, soil reinforcement, wash-out and scour protection etc. This objective was believed to be best accomplished by developing design gudielines for the use of fabrics and by disseminating information pertaining to the various possible applications of synthetic filters. Keeping this objective in mind, a detailed action program was set up, the main phases of which are listed as follows: Literature review. Review and study the pertinent literature published in Canada, in the U.S.A. and in other foreign countries. The principal reference was the two volumes of proceedings of the First International Conference on the Use of Fabrics in Geotechnics. Publications by other reputable journals and by renowned authors were studied and the recommendations, if based on actual field experiences were adopted. While there is a proliferation of papers published by the manufacturers of fabrics, some skepticism was exercised in accepting their findings at face value. A tentative specification was drawn up using Government publications, various States' special provisions and specifications of the U.S. Corps of Engineers. A list of references appears at the end of this report. Determine the engineering requirements for the use of fabrics. Since these requirements depend to a great extent on permeability, seepage, piping and filtration characteristics of the soils being protected, a short chapter of this study is devoted to a rudimental treatise of these subjects. Identify the physical properties of a good synthetic fabric. The requirement for the use of filters, of course, depends on soil and water conditions. Its performance, on the other hand, is governed by its strength, permeability, opening size, elongation, durability, susceptibility to weathering and the like. All these properties were studied and as a result a tentative specification was developed for use by designers as an interim guide. It is anticipated that during the next year or so the specification will be finalized using the knowledge gained during the monitoring of additional field installations. List the possible applications of filter fabrics in highway construction and maintenance. This phase of the study consisted of determining various possibilities of filter fabric applications, discussing case histories reported by outside agencies, providing examples from our own experience and presenting practical guidelines for construction personnel. Laboratory testing program for available synthetic filters. A testing program was initiated by the Materials and Laboratory Services Section in Downsview to determine strength, permeability characteristics and pore size distributions for all available fabric. The data obtained will enable a designer to select the most economical material suitable to a particular soil and seepage condition. In Appendix `A' of this report, there is a list providing the names and distributors of currently available filter fabrics. Some laboratory test results are also listed, these are shown as results of manufacturers, other agencies or this Ministry's.

  • Corporate Authors:

    Ontario Ministry of Transportation & Communic, Can

    Engineering Materials Office, 1201 Wilson Avenue
    Downsview, ONo M3M 1J8,   Canada 
  • Authors:
    • Barsvary, A K
    • Korgemagi, P
  • Publication Date: 1979-10

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 91 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335517
  • Record Type: Publication
  • Report/Paper Numbers: EM-13 4th ED
  • Files: TRIS
  • Created Date: Nov 23 1981 12:00AM